This study aims to identify the availability of ingredients application of Islamic banks in Libya, from the standpoint of customers of conventional banks in Derna, and to achieve the objectives of the study, were followed descriptive analytical method, the researcher has developed a questionnaire based on some previous studies, has been the study sample in customers six commercial banks Libyan public and private workers in Derna, and analysis of the study data was used computer and use a statistical program of the service software contained in (SPSS), where they were to reach many of the results can be summarized as follows: the study revealed that the overall level elements of the application of Islamic banks in Libya is high, as demonstrated by the study also said that the level of social determinants high is the highest average among the elements of the application of Islamic banks, as the study revealed that the level of constituents bank also high, and came in second place, while showing that the level of ingredients legislative came medium, the lowest averages between elements of the application of Islamic banks.